The word spacewalkers is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 26
Highest Scoring Words With Friends™ Play In The Letters spacewalkers
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Seven Letter Word Alert: (72 words)
asperse, aweless, capless, carless, carpals, carpels, cereals, clasper, clawers, creases, crewels, earless, elapses, escaper, escapes, escarps, kelpers, leakers, leapers, leasers, packers, palaces, parcels, parsecs, pascals, peckers, placers, pleaser, pleases, presale, rascals, reawake, reclasp, reclass, relaces, relapse, repaces, repacks, repeals, replace, resales, rescale, reseals, reskews, respace, respeak, rewalks, sackers, sacrals, sarapes, scalars, scalers, scalper, sclerae, scleras, scrapes, scrawls, sealers, serapes, skelper, skewers, slacker, spacers, spackle, sparkle, speaker, speckle, spewers, sprawls, walkers, warless, weasels